CN204883028U - A optical imaging system for on -vehicle control - Google Patents
A optical imaging system for on -vehicle control Download PDFInfo
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- CN204883028U CN204883028U CN201520440127.5U CN201520440127U CN204883028U CN 204883028 U CN204883028 U CN 204883028U CN 201520440127 U CN201520440127 U CN 201520440127U CN 204883028 U CN204883028 U CN 204883028U
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- lens
- imaging system
- optical imaging
- vehicle
- lens group
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Abstract
The utility model discloses an optical imaging system for on -vehicle control, it arranges preceding lens group, the diaphragm that has positive refractive power, rear mirror piece group and the light filter that has positive refractive power in proper order to include from the object plane to image planes, preceding lens group is equipped with the first lens that have negative optical power, negative optical power's second lens and positive refractive power's third lens in proper order, rear mirror piece group is equipped with the fourth lens that have positive refractive power, negative optical power's the 5th lens and positive refractive power's VI lenses in proper order, and wherein, the fourth lens become the contact lens with the 5th lens composition. The utility model discloses a carrying out the rational design to lens structure, finally designing a optical length and shorten to and be less than 18.3mm, the real cut -off distance is 4.8mm, and total angle of vision reaches 143, and resolution ratio reaches an optical imaging system for on -vehicle control of 2, 000, 000 pixels, and the camera lens volume is littleer, relative aperture is big, and the shooting still possesses the image quality of preferred under the night low light level to effective the cost is reduced.
Description
Technical field
The utility model relates to a kind of optical imaging system, specifically refers to a kind of optical imaging system being applied to drive recorder, vehicle-mounted monitoring aspect.
Background technology
Along with the development of society, the requirement of every field to safety and monitoring is more and more higher, particularly field of traffic and vehicle-mounted monitoring field.Now commercially main flow monitoring, shooting, mainly resolution is lower for on-vehicle lens, when light is weak particularly night cisco unity malfunction, captured image is that overall sharpness or the acutance of picture are all not ideal enough, can not meet monitoring, shooting, the high-resolution of picture of vehicle-mounted requirement and the requirement that all normally works for 24 hours far away.Along with the development of security protection industry and the increasingly mature of monitoring technique, the demand of camera lens and quality are improved constantly.And current vehicle-mounted product is just towards high imaging quality, trend toward miniaturization development, and drive recorder is exactly typical case wherein.Existing on-vehicle lens can not meet the demand of current drive recorder high imaging quality in sharpness, and high definition security lens stock size of the same type is comparatively large, and length is longer, and more than 20mm, and field angle is large not, is not suitable for being applied in onboard system.
Utility model content
The purpose of this utility model overcomes weak point of the prior art, provides the optical imaging system for vehicle-mounted monitoring of a kind of wide-angle, high definition.
The purpose of this utility model is achieved through the following technical solutions:
A kind of optical imaging system for vehicle-mounted monitoring, comprise the front lens group, diaphragm, the rear lens group with positive light coke and the optical filter that are arranged in order from object plane to image planes and there is positive light coke, described front lens group is provided with the 3rd lens with the first lens of negative power, the second lens of negative power and positive light coke successively, described rear lens group is provided with the 6th lens with the 4th lens of positive light coke, the 5th lens of negative power and positive light coke successively, wherein, the 4th lens become balsaming lens with the 5th lens combination.
Concrete, meet the following conditions between described front lens group and rear lens group:
2<f
before/ f
after<5, f
beforefor front lens group focal length, f
afterfor rear lens group focal length.
Concrete, described front lens group focal length meets the following conditions:
18<f
before<28,4<f
before/ f
always<12, wherein, f
alwaysfor described optical imaging system effective focal length.
Rear lens group meets the following conditions:
2<f
after<10,1<f
after/ f
always<4
Concrete, the first described lens are curved month type spherical lens, concave surface facing diaphragm; Second lens are curved month type spherical lens, concave surface facing object plane; 3rd lens are biconvex spherical lens; 4th lens are plano-convex lens, and plane is towards diaphragm, and the 5th lens are falcate spherical lens, concave surface facing diaphragm; 6th lens are plano-convex lens, convex surface facing diaphragm.
Concrete, described first lens meet: Nd ﹤ 1.6, dispersion Vd ﹥ 50,
Wherein Nd represents the d optical index of lens material, and Vd represents the d light Abbe constant of lens material.
Concrete, described first convex lens surface is coated with the optical film of waterproof anti-scratch.
Concrete, described 5th lens meet: Nd ﹥ 1.8, Vd ﹤ 25.
The utility model has the following advantages and beneficial effect compared to existing technology:
1, the utility model is by carrying out appropriate design to lens construction, a optics overall length of final design shortens to and is less than 18.3mm, rear cut-off distance is 4.8mm, total field angle reaches 143 °, resolution reaches the optical imaging system for vehicle-mounted monitoring of 2,000,000 pixels, and eyeglass one external diameter is less than 8.6mm, and camera lens volume is less, and high-definition monitoring lens wearer one external diameter of the same type is on the market greater than 12mm mostly, optics overall length is mostly at more than 20mm.
2, the optical imaging system relative aperture for vehicle-mounted monitoring of the present utility model is large, and F number is 2.1, takes and still possess preferably image quality under night low-illumination.
3, by rational lens combination, effectively reduce the susceptibility of camera lens, camera lens tolerance is loose, material relative moderate, is applicable to manufacturing, effectively reduces cost.
4, the glass mirror adopting six physico-chemical properties stable, working temperature reaches automobile industry standard TS16949 requirement,-40 ° ~+85 ° normally work can be met, effectively widened the working temperature of camera lens, improved the stability of vehicle-mounted traveling recorder camera lens cope with bad environmental work.
5, camera lens rear end adds IR-CUT, filters infrared band to the interference of imaging, effectively improves the image quality of camera lens.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.Object space is in left-most position, image space is in right-most position.
The MTF curve of the optical imaging system for vehicle-mounted monitoring that Fig. 2 provides for the utility model.
Fig. 3 is axial chromatic aberration curve map of the present utility model.
The distortion curve figure of the optical imaging system for vehicle-mounted monitoring that Fig. 4 provides for the utility model.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but embodiment of the present utility model is not limited thereto.
Embodiment
As shown in Figure 1, the present embodiment provides a kind of optical imaging system for vehicle-mounted monitoring, comprise the front lens group being arranged in order from object plane to image planes and there is positive light coke, diaphragm 7, there is rear lens group and the optical filter 8 of positive light coke, described front lens group is provided with first lens 1 with negative power successively, second lens 2 of negative power and the 3rd lens 3 of positive light coke, described rear lens group is provided with the 4th lens 4 with positive light coke successively, 5th lens 5 of negative power and the 6th lens 6 of positive light coke, wherein, 4th lens 4 and the 5th lens 5 are combined into balsaming lens.The utility model is by carrying out appropriate design to lens construction, a optics overall length of final design shortens to and is less than 18.3mm, rear cut-off distance is 4.8mm, total field angle reaches 143 °, resolution reaches the optical imaging system for vehicle-mounted monitoring of 2,000,000 pixels, eyeglass one external diameter is less than 8.6mm, and camera lens volume is less; Optical imaging system relative aperture for vehicle-mounted monitoring of the present utility model is large, and F number is 2.1, takes and still possess preferably image quality under night low-illumination.
Meanwhile, by by eyeglass reasonable combination, effectively reduce the susceptibility of camera lens, camera lens tolerance is loose, material relative moderate, is applicable to manufacturing, effectively reduces cost.
Meet the following conditions between described front lens group and rear lens group: 2<f
before/ f
after<5, f
beforefor front lens group focal length, f
afterfor rear lens group focal length.By said structure, make sampling image lens can have short back focal length, effectively can shorten camera lens from object to the distance of imaging surface, to reduce the volume of camera lens, and promote the application of sampling image lens.
Described front lens group focal length meets the following conditions:
18<f
before<28,4<f
before/ f
always<12, wherein, f
alwaysfor optical imaging system effective focal length.
Rear lens group meets the following conditions:
After 2<f after <10,1<f/the total <4 of f
The burnt allocation proportion of light of the forward and backward lens set of so rational control, is conducive to the incident ray height controlling front lens group, on the one hand to reduce the external diameter of optical system senior aberration and eyeglass; The chief ray shooting angle through rear lens group can be reduced on the other hand, to improve the relative brightness of optical system.
The first described lens are curved month type spherical lens, concave surface facing diaphragm; Second lens are curved month type spherical lens, concave surface facing object plane; 3rd lens are biconvex spherical lens; 4th lens are plano-convex lens, and plane is towards diaphragm, and the 5th lens are falcate spherical lens, concave surface facing diaphragm; 6th lens are plano-convex lens, convex surface facing diaphragm.By said structure, thus make the image space main face forward shift of optical system, thus system length is shortened.
Accommodate the light at more Large visual angle angle to be conducive to camera lens, described first lens meet: Nd ﹤ 1.6, dispersion Vd ﹥ 50, wherein Nd represents the d optical index of lens material, and Vd represents the d light Abbe constant of lens material.
In order to realize coordinating better with glass mirror, and can color difference eliminating better, described 5th lens meet: Nd ﹥ 1.8, Vd ﹤ 25.
Described first convex lens surface is coated with the optical film of waterproof anti-scratch.By adopting the design of plated film waterproof anti-scratch at the first lens front surface, structurally consider the waterproofing design of camera lens, it is inner that anti-sealing, mist infiltrate camera lens, can meet and normally work in severe rain, greasy weather gas.
Fig. 2 to Fig. 4 is the optical performance curve figure corresponding to case study on implementation, and wherein Fig. 2 MTF curve of being, represents the comprehensive solution of an optical system as level.Fig. 3 is axial chromatic aberration curve map of the present utility model (also can be spherical aberration curve map), by F, d, C of commonly using (F=0.486um, d=0.587um, C=0.656um) three the wavelength of coloured light represent, unit is millimeter mm.The distortion curve figure of the optical imaging system for vehicle-mounted monitoring that Fig. 4 provides for the utility model, represent the distortion sizes values in different field angle situation, unit is %.As seen from the figure, this optical lens by various aberration correction to a good level.
This field angle FOV being used for the optical imaging system optimum of vehicle-mounted monitoring is 143 °, and TTL optics overall length is less than 18.3mm, and f-number F/NO is 2.1,
Parameters is as following table 1:
Table 1
Above-described embodiment is the utility model preferably embodiment; but embodiment of the present utility model is not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present utility model and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection domain of the present utility model.
Claims (8)
1. the optical imaging system for vehicle-mounted monitoring, it is characterized in that: comprise the front lens group, diaphragm, the rear lens group with positive light coke and the optical filter that are arranged in order from object plane to image planes and there is positive light coke, described front lens group is provided with the 3rd lens with the first lens of negative power, the second lens of negative power and positive light coke successively, described rear lens group is provided with the 6th lens with the 4th lens of positive light coke, the 5th lens of negative power and positive light coke successively, wherein, the 4th lens become balsaming lens with the 5th lens combination.
2. the optical imaging system for vehicle-mounted monitoring according to claim 1, is characterized in that: meet the following conditions between described front lens group and rear lens group:
2<f
before/ f
after<5, f
beforefor front lens group focal length, f
afterfor rear lens group focal length.
3. the optical imaging system for vehicle-mounted monitoring according to claim 2, is characterized in that: described front lens group focal length meets the following conditions:
18<f
before<28,4<f
before/ f
always<12, wherein, f
alwaysfor optical imaging system effective focal length.
4. the optical imaging system for vehicle-mounted monitoring according to claim 3, is characterized in that: rear lens group meets the following conditions:
2<f
after<10,1<f
after/ f
always<4.
5. the optical imaging system for vehicle-mounted monitoring according to claim 1, is characterized in that: the first described lens are curved month type spherical lens, concave surface facing diaphragm; Second lens are curved month type spherical lens, concave surface facing object plane; 3rd lens are biconvex spherical lens; 4th lens are plano-convex lens, and plane is towards diaphragm, and the 5th lens are falcate spherical lens, concave surface facing diaphragm; 6th lens are plano-convex lens, convex surface facing diaphragm.
6. the optical imaging system for vehicle-mounted monitoring according to claim 1, is characterized in that: described first lens meet: Nd ﹤ 1.6, dispersion Vd ﹥ 50,
Wherein Nd represents the d optical index of lens material, and Vd represents the d light Abbe constant of lens material.
7. the optical imaging system for vehicle-mounted monitoring according to claim 1, is characterized in that: described 5th lens meet: Nd ﹥ 1.8, Vd ﹤ 25.
8. the optical imaging system for vehicle-mounted monitoring according to any one of claim 1-7, is characterized in that: described first convex lens surface is coated with the optical film of waterproof anti-scratch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520440127.5U CN204883028U (en) | 2015-06-23 | 2015-06-23 | A optical imaging system for on -vehicle control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520440127.5U CN204883028U (en) | 2015-06-23 | 2015-06-23 | A optical imaging system for on -vehicle control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204883028U true CN204883028U (en) | 2015-12-16 |
Family
ID=54827385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520440127.5U Withdrawn - After Issue CN204883028U (en) | 2015-06-23 | 2015-06-23 | A optical imaging system for on -vehicle control |
Country Status (1)
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107783252A (en) * | 2016-08-29 | 2018-03-09 | 信泰光学(深圳)有限公司 | Imaging lens |
| CN108490584A (en) * | 2018-05-09 | 2018-09-04 | 江西联创电子有限公司 | Optical imaging lens |
| CN109932807A (en) * | 2017-12-18 | 2019-06-25 | 宁波舜宇车载光学技术有限公司 | Optical lens |
| CN110320646A (en) * | 2019-07-25 | 2019-10-11 | 广东弘景光电科技股份有限公司 | Large aperture wide-angle optics and its camera module of application |
| CN110646919A (en) * | 2019-08-22 | 2020-01-03 | 江西联创电子有限公司 | Fisheye lens |
| CN111175939A (en) * | 2015-12-28 | 2020-05-19 | 三星电机株式会社 | Optical imaging system |
-
2015
- 2015-06-23 CN CN201520440127.5U patent/CN204883028U/en not_active Withdrawn - After Issue
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111175939A (en) * | 2015-12-28 | 2020-05-19 | 三星电机株式会社 | Optical imaging system |
| US11885941B2 (en) | 2015-12-28 | 2024-01-30 | Samsung Electro-Mechanics Co., Ltd. | Optical imaging system |
| US11442252B2 (en) | 2015-12-28 | 2022-09-13 | Samsung Electro-Mechanics Co., Ltd. | Optical imaging system |
| CN107783252A (en) * | 2016-08-29 | 2018-03-09 | 信泰光学(深圳)有限公司 | Imaging lens |
| CN107783252B (en) * | 2016-08-29 | 2020-08-11 | 信泰光学(深圳)有限公司 | Imaging lens |
| CN109932807B (en) * | 2017-12-18 | 2021-09-10 | 宁波舜宇车载光学技术有限公司 | Optical lens |
| CN109932807A (en) * | 2017-12-18 | 2019-06-25 | 宁波舜宇车载光学技术有限公司 | Optical lens |
| CN108490584B (en) * | 2018-05-09 | 2019-10-29 | 江西联创电子有限公司 | Optical imaging lens |
| US11604331B2 (en) | 2018-05-09 | 2023-03-14 | Jiangxi Lianchuang Electronic Co., Ltd. | Optical imaging lens group, vehicle camera and driving assistance system |
| CN108490584A (en) * | 2018-05-09 | 2018-09-04 | 江西联创电子有限公司 | Optical imaging lens |
| CN110320646A (en) * | 2019-07-25 | 2019-10-11 | 广东弘景光电科技股份有限公司 | Large aperture wide-angle optics and its camera module of application |
| CN110646919A (en) * | 2019-08-22 | 2020-01-03 | 江西联创电子有限公司 | Fisheye lens |
| CN110646919B (en) * | 2019-08-22 | 2021-06-25 | 江西联创电子有限公司 | Fisheye lens |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20151216 Effective date of abandoning: 20180316 |